AWS-SNS-To-Slack-hook

Use AWS Lambda (not heroku or on-permise machine) to forward message to Slack from SNS

Why I use AWS Lambda not heroku or any other service:

• Cheapest (1 million request only cost 0.20 USD. It is the cheapest service than any cloud-provider service)
• Build-in integration with SNS trigger
• Low maintaining effort

Preparing

• Prepare the IAM Execution Role. For example:

  {
    "Version": "2012-10-17",
    "Statement": [
    {
        "Effect": "Allow",
        "Action": [
          "sns:GetTopicAttributes",
          "sns:List*"
        ],
        "Resource": "*"
      }
    ]
  } 

• Prepare the Slack web-incoming-webhook url
  1. Create a channel for aws-sns in slack
  2. add a Incoming WebHooks service integration
  3. get the webhook url

Create Lambda Function with sns-slack.js code

AWS SNS Topic Subscription for AWS Lambda

• Select topic you want and subscirpt to it
• select AWS Lambda as Protocol and select Lambda function